Caliper mounting Bolts.

Here is an interesting question. I was going to replace my rotors this weekend but i could not get those two big bolts that hold the caliper in place. Not the caliper torx bolts. And man those Fcks are on there pretty dam tight too. I tried 18mm and 11/16 and neither one worked. They were close though so now, I have 2 rounded bolts to get off . But I digress. Does anyone know what size these friggin bolts are. Since it was assembled in Canada I thought it would be metric but I guess not.

I had the same problem the first time I replaced the front pads/packed bearings, and decided to turn the rotors. I still have the 18mm socket that BROKE when I attempted to lossen the bolts. Manual says the factory torque is about 150 ft-lbs as I recall. No wonder. I'd say the best bet is a 1/2" drive impact wrench w/ 18mm socket (that's what I ended up using), or an impact socket with one long cheater bar.

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